cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A366062 Lexicographically earliest infinite sequence of distinct nonnegative integers such that for any k > 0, the k-th binary digit in the even bisection is different from the k-th binary digit in the odd bisection.

Original entry on oeis.org

0, 2, 4, 1, 3, 8, 5, 9, 16, 14, 10, 20, 6, 11, 17, 18, 21, 19, 32, 28, 12, 13, 33, 56, 24, 29, 34, 26, 22, 36, 25, 48, 57, 49, 50, 40, 58, 41, 51, 35, 64, 7, 15, 65, 37, 80, 59, 66, 52, 27, 67, 96, 112, 30, 23, 128, 60, 53, 81, 97, 113, 98, 104, 114, 105, 99
Offset: 0

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Author

Rémy Sigrist, Sep 27 2023

Keywords

Comments

Leading zeros in binary expansions of positive values are ignored.
Is this sequence a permutation of the nonnegative integers?

Examples

			The even and odd bisections, in decimal and in binary, begin as follows:
a(2n)        |0|  4  | 3 |  5  |   16    |  10   |  6  |   17    |   21    |...
bin(a(2n))   |0|1 0 0|1 1|1 0 1|1 0 0 0 0|1 0 1 0|1 1 0|1 0 0 0 1|1 0 1 0 1|...
bin(a(2n+1)) |1 0|1|1 0 0 0|1 0 0 1|1 1 1 0|1 0 1 0 0|1 0 1 1|1 0 0 1 0|...
a(2n+1)      | 2 |1|   8   |   9   |  14   |   20    |  11   |   18    |...
		

Crossrefs

Cf. A333010.

Programs

  • PARI
    See Links section.
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